Finding the Fourth Proportional to 2,232.75, 3,081.33 and 1,288.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,232.75 : 3,081.33 = 1,288.71 : x
2. Step 2: Convert to fraction form
   2,232.75/3,081.33 = 1,288.71/x
3. Step 3: Cross multiply
   2,232.75x = 3,081.33 × 1,288.71
4. Step 4: Simplify right side
   2,232.75x = 3,970,940.78
5. Step 5: Solve for x
   x = 3,970,940.78/2,232.75
6. Step 6: Final answer
   x = 1,778.50